Congestion problem is a critical issue at the cafeteria of the University of Tokushima. To cope with this problem, several solutions are under consideration, including layout design, payment method, facilities, etc. In order to examine these solutions, field studies at the cafeteria are required. However, it is neither always possible nor realistic to do so in actual situations. This study applied a simulation-based approach to this problem from the view point of saving time, saving cost, and avoidance of risks. This paper presents the simulation model designed in this research, clarifies how it was implemented for simulation, and the results of simulation to review the feasibility of the proposed solutions.